On Friday, Nov. 27 at Churchill Downs, Tri-Bone Stables' Effinex will try to nail down the first grade I victory of his career when he faces an expected eight other horses in the $500,000 Clark Handicap.

G. Watts Humphrey Jr.'s Frivolous is among 13 entered in the $200,000 Falls City Handicap (gr. II) at Churchill Downs Nov. 26, but she could end up facing males in the $500,000 Clark Handicap (gr. I) the following day.

Defending champion Untapable will have to defeat a strong field that includes grade I winners Wedding Toast, Got Lucky, Sheer Drama, Curalina, I'm a Chatterbox, My Sweet Addiction, and Stopchargingmaria.

G. Watts Humphrey Jr.'s Breeders' Cup Distaff (gr. I) contender Frivolous turned in her final work for the Oct. 30 test when she breezed five furlongs in :59 4/5 under trainer Vicki Oliver at Keeneland.

In a rare matchup of Kentucky Oaks (gr. I) winners, Winchell Thoroughbreds' Untapable and Brereton Jones' Lovely Maria were entered Thursday as part of a field of nine fillies and mares for the 60th Spinster.

Starting in a stakes race for the first time in her career, Casual Smile punched through rivals in early stretch and battled to a clear victory in the $150,000 WinStar Matchmaker Stakes (gr. III) Aug. 2 on the Monmouth turf.

Harold Queen's Sheer Drama will attempt to avenge her loss to Frivolous in the June 13 Fleur de Lis Handicap (gr. II) when those two and five other fillies and mares face off in the $750,000 Delaware Handicap (gr. I) July 18.